Sifting device



Patented Get. 25, 1927.

STATES' ldililij? PATENT iih..

SIFTNG DEVICE.

Application filed January 15, V1993"?. Serial No. 161,30*?.

My invention relates generally to devices for sifting materials and particularly to shovel-like devices which have sifting means.

One of the objects of my invention is to provide a simple, inexpensive, and eilicient sifting device.

`Another object of my invention is vide a simple, inexpensive, and shoveldike sifting device.

Another object of my invention is to provide a simple, inexpensive, and` eiheient shovel-like sifting device which is easily manipulated for either sifting or shoveling purposes.

Another object of my invention is a simple, effective, and efficient joint between a screen and the supporting frame thereof.

Another object of my invention is a simple, effective, and efficient binder for unsupported edges of screens.

A device embodying the features of my invention is shown on the accompanying drawing in the form of a shovel-like sift-- ing device; my invention, however, is applicable to other forms.

lln the accompanying drawing Fig. 1 is a general perspective view ol a shovel-like sifting device embodying the features of my invention.

Fig. 2 is an end view of the front end of Fig. 1, on a larger scale, showing more clearly the relations of the binder and the frame.

Fig. 3 4is a section, on a larger scale, taken on a transverse plane indicated by the line SMB in Fig. 1, showing more clearly the relations of the screen and the frame and the structure of the joints between the frame and the screen and the structure of the supporting edges of the screen.

Fig. 4l is a sectional view of the front end of Fig. 1, on a larger sc: le, taken in a longi tudnal plane indicated by the line 4; in Fig'. 1, showing more clearly the cross-sectional formation of the binder and the relation thereof to the screen and to the frame members.

Fig. 5 is a section, on a larger scale, taken in a transverse plane indicated by the line 5-5 in Fig. 1, showing the relation between the frame members and the handle and the fastening or clamping means thereof.

Fig. 6 is a sectional view, on a larger scale. taken in a longitudinal plane indicated by the line G in Fig. 1, showing the relations between the base bar and the binder and the frame and the screen. f

to proefficient Similar reference characters refer to similar parts throughout the views.

The device shown in the laccompanying drawing comprises, principally, the frame members A and B, the screen C, the binder D, and the handle E.

The frame is made of material having a channel formed cross-section and comprises the component parts il and B, both together formino; the complete frame when all. of the elements of the device are assembled.

The part A comprises the longitudinal portion 10 and the middle portion 11 bent inwardly and substantially at right angles to the portion 10, and the end portion 1Q bent outwardly and substantially at right angles to the portion 11 and inclined upwardly .so that the handle E will be disposed at an angle to the screen C when the device is assembled.

rlhe part B comprises the longitudinal portion 13 and the middle portion 111 bent inwardly substantially atl rightangles to he portion 13, and the end portion 15 bent outwardly and substantially at right angles tothe portion. 141 and inclined upwardly at the same angle as the end 12 and forms a component part with the end 12 to grip or clamp the handle as will be explained fur ther hereinafter.

The parts A and B are bent so that all i of the flanges and all of the hollows of the channel sectioned material thereof face inwardly or toward each other for the purpose, appearing presently.

The screen C, of any suitable material or mesh, has three edges thereof bent upwardly and doubled up downwardly over the portion first bent and on the outside thereof to form the support edges 16. This structure provides a simple and efiicient support or strengthening means for the screen and aids materially in supporting the screen as well as in effecting a joint between the screen and the frame. o i

The flanges 16 rest on the inner surface of the lower flanges of the portions 10, 11, 13 and lll and abut the inside of the webs of the portions just mentioned.

This structureV of disposing the AeXtreme edges of the screen between the webs of the frame members and other port-ions of the screen prevents the fraying out of the screen and also provides an unobstructed screening surface. y

The fastening means between the screen ne y Yce

and the frame comprise the rivets 17 extending through open portions of the screen and through the webs of the frame with the washers 18 between the head of the rivets and the fianges 16; lthese elements being firmly riveted against the webs of the frame.

The bind-er D is formed of sheet `metal o bent over the front and free end 19 ofthe screen C and has the ears 2O bent up from,

the eais'22 abut the inside of the web of' the portions 10 and 13. rlhe rivets 25 ere tend through the ears 2O and 22 and through the iianges'lt and through the webs lof the portions 10 and 13 and are securely riveted inposition.

rlhis structure not only provides a binder for the otherwise free front edge of the screen but also stiffens the screen and. helps to support the'same and forms an effective tie between the front outer ends of the portions 10 and 13 and provides a smooth end for the screen when the device is used as a shovel.` i f l The handle E has the stem 26 which has the straps'27 secured to the sides of th-eouter end thereof by means ofthe rivets 28. `'lhe handle member 29 extends between the straps with the longitudinal axis thereof parallel with the plane of the screenl C to facilitate the `sifting and Shoveling operations of the* device. e

The inner end of the stem 26 extends in between the ends 12 and 15 and is disposed in the hollows thereof. The ends 12 and 15 are clamped against the inner end of thc stem 26 by means of the rivets 30,.

TWhen the stem 26 is made of wood or other comparatively soft material, the tight- 'enin' ofthe rivets forces the aortions 3l n l of the flanges into this soft material and thereby automatically forms the grooves 32 therein. This groove formation aids materially `in retaining the stem in properrela- -tion to the front end of thev device.

When'the stem 26 is made of metal or of material `which can not be depressed by the riveting process mentioned, the grooves 32 lmay be cut into or otherwise formed in the stem 26 so that the portions 31 mayengagetherein :to hold and to maintainthe front of the'device in' proper relation tothe handle. v f

Due to the open front end of the device shown `and described, the same can lbe used similar to a shovel to easily deposit sift-able material thereon and to'easily remove material therefrom. The handle E affords a convenient means for operating the sifter with. the operator located away from the sifting end of the device so that dust or the like, from ashes for instance, Vdo not reach him so easily while he is sifting.

'My invention has many advantages some of which are exemplified in the device shown and described. in sifting ashes for instance with' the device shown and described, the shovel end of the device can easily beinserted into the ashpit .of a furnace and a'quantity of the ashesiii the ashpit can be Vdeposited thereon Vin a manner similar to a shovel; the lsifting operation is Vperformed while` the shovel. end is still in the ash'pit; this eliminates the handling and the sifting of the ashes outside of the aelipitV and consequently eliminates all dust outside or the ashpit; whatever dustl is created in the sifting operation is carried away through 'the exhaust flue of the furnace; all material which remains on the device after sifting (usually material which is not completely burned) can easily be returned to the comvbustioii chamber of the furnace by the device (as a shovel) without creatingdust oiI without entra handling of the material; and nothing more than the final incombustible ashesneed to be removed from the ashpit; therefore, the device saves fuel, eliminates dust, and is convenient ofoperation.

I am aware that my invention can be applied to devices other than theash sifter device shown and described and that various changes inthe' structure as well as `in the arrangement of elements may be made within the scope ofthe appendedV claims; therefore, without limiting myself to the precise structure` and arrangementV of elements shown and described, nor to the precise application of my invention scribed, I claim A.

1. indevice of the character described having a frame made of channel section material with all'of the flanges thereof convergent toward the middle of the device.

2. A device of the 'character y'described having a frame made of Ushaped. channel section 'material and` having ends thereof spaced apart with the flanges thereof facing each other tof forma socket to grip a `handle and to confine the same in all lateral directions. Y V Y Y 3. A device of the character described including a frame made of of convergent toward the middle of the device,l and a screen supported on said frame in the Vhollow portion thereof. n 4.' A device of *thev character described including a screen supported by edges thereof, and'said edges doubled up to increase the supporting capacity thereof. Y

5. A device of the character described inso 'l as shownA and de- Y U-shaped chan-` nel section material with the anges'there` cluding a screen having one edge thereof unsupported, and a sheet metal binder bent over said one edge and over the sides adjacent to said edge and portions thereof indented into open portions of said screen to retain said binder on said screen and to stii'en the same.

6. A device of the character described including a traine having one open end, a

1 screen supported in said frame, a binder over the edge of said screen at said open end ot the Ytrarne, and a base bar between said binder and the opposite end of said traine and disposed on the bottom oit said screen.

7. A device of the character described including a traine composed of two component parts each made of channel section n1aterial and having a screen support portion and a handle support portion, the flanges o said two parts facing each other, a screen supported in the hollow of said screen support portions, and a handle clamped between said support portions.

8. A device of the character described including a frame composed of two component parts each made of channel section niaterial and having a screen support portion and a handle support portion, the iianges or' said two parts facing each other, the front end of said frame being open, a screen supported in the hollow of said channel parts, a binder over the unsupported edge of said screen, and a handle clamped between said handle support portions ot said frame.

9. A joint between a channel section member and a screen comprising a double up edge of said screen resting on one of the iianges of said channel member and abutting the web thereof, and a fastening member extending through an open portion ot said screen and through said web and having means for engaging some of the inaterial of said screen.

l0. A binder for an edge of a screen comprising a sheet bent over the end and over both sides of said edge and portions thereof indented into open portions of said screen to stiiien said binder and to lretain the saine on said edge of the screen.

NLLIAM ELMENTHALER. 

